不同异构体的氯氰菊酯对德国小蠊的毒力

The toxicity of cypermethrin to Blattella germenica(L.)

氯氰菊酯的顺式或反式、或其混合体对德国小蠊的生物活性，在50～500PPm浓度范围内，击倒中浓度由原369ppm降至49～164ppm；高温稳定性中的击倒中时，由原10～18分降至4～10分。

The effectiveness of d-cypermethrin or t-cypermethrin and the mixture of d. t-cypermethrin to Blattella germenica (L.) was tested by using drug-film inethod. The result showed that the KC50 of different isomer of cypermethrin was greatly reduced from 369ppm (cypermethrin) to 49 ppm(d-cypermethrin) 3nd 164ppm (t-cypermethrin), and the KT50 also decreased from 10-18 min (cypermethrin) to 4-10min (d, t-isomer and the mixture of d, t-isomer) respectively.